iphone 4 internet only works with wifi
I have an iphone 4 (no 'S') and for some reason I can't connect to the internet or access any apps that need to connect unless I am using wifi. It started after the most recent software update, but I can't find anything online that talks about it. Phone calls and texts work with no problem. I think I just need to make sure all of my settings are correct, but again, I can't find a troubleshooting checklist anywhere. Can anyone help me??
iPhone 4, iOS 7.1